JSHint and JSCS fixes in font plugin tests.
Plugin task: Made symlinks to work also on Windows.
Specifying id conflicted with dialog API and uiEl.getElement returned null.
Tests: check if docprops is available.
Changelog entry.
Merge branch 't/12546'
Added dtd.main.
Removed unneccessary extensions - style is already allowed in P and DP groups.
Added comment explaining minor simplification in our DTD.
Changelog entry.
Merge branch 't/12550'
Use the sync version of fs.unlink.
This line was truly missing.
Tests: Added test checking whether change event is fired after keyboard navigation.
Checking last keydown snapshot as well, to prevent unwanted changes.
Docs: Added information about parameter default value.
Changelog entry.
Merge branch 't/12300'
Tests: Written for static method in indentlist plugin.
Tests: Written ticket test #12141.